Route guide

Sergeant Bluff to Denver (SUX-DEN): Nonstop Upgrade & Award Space

United Airlines flies the SUX to DEN nonstop about 11 times a week. That's enough service to give you a real choice of departures, though premium seats don't sit unclaimed for long. 2LNR watches every SUX to DEN departure for confirmed upgrade and award space and can alert you when a date you're tracking opens up.

Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.

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11
Nonstop flights a week
466 mi
Nonstop distance
Free
To get started

Confirmed upgrade & award space on every SUX to DEN departure

2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Open the calendar for Sergeant Bluff to Denver to see which departures have real space, or watch the route and get alerted when space opens.

See real availability

Confirmed upgrade and award seats on each SUX to DEN departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See SUX to DEN on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Sergeant Bluff to Denver nonstop

Carriers operating SUX to DEN nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

  • United Airlines
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Frequently asked questions about SUX to DEN

How far is Denver from Sergeant Bluff?
SUX to DEN covers about 466 miles nonstop. Flight times vary by aircraft and season; each scheduled departure on this page lists its own times.
Which airlines fly nonstop from SUX to DEN?
United Airlines is currently the only airline flying SUX to DEN nonstop. 2LNR tracks confirmed upgrade and award space on every United Airlines departure.
How many flights a week are there from SUX to DEN?
About 11 nonstop flights a week run between Sergeant Bluff and Denver in the current schedule, operated by United Airlines. Frequency shifts by season; the calendar on this page reflects what's currently scheduled.
How do I check upgrade or award availability on SUX to DEN?
Open the SUX to DEN calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the Sergeant Bluff to Denver route, and 2LNR will notify you when space opens. It's free to start.

Never miss SUX to DEN upgrade or award space

Track confirmed availability, set alerts, and book with confidence. Free to start, no credit card required.

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